.dir_img{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/dir.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.other_file{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/file.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.xlsx{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/xls.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.png{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/png.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.pdf{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/pdf.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.apk{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/apk.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.zip{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/zip.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}
.mp4{
    margin-top: 5px;
    height: 90px;
    width: 100%;
    background-image:url("[[@{/assets}]]/img/file/视频.png") ;
    border-radius: 8px;
    background-repeat:no-repeat;
    background-size: 90px;
    background-position:center;
}